<html><head></head><body><div style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px;"><div><div>Dear all</div><div><br></div><div>I simulated a radiotherapy system and got the phase space.How can I get the energy spectrum from the phase space?</div><div><br></div><div>Thanks in advance.</div><br></div></div></body></html>